It is the first pen I have ever bought/had, so I cannot express an opinion regarding its Flow/Grip/Accuracy, but since this pen does not have any other reviews and I have used it as much as any other, it must be worth something and here is my opinion.

For simple writing and drawing, it is good. The ink dries quickly and does not mix with my ohuhu alcohol markers at all. It is also very lightweight, which might be good for long hours of writing, but personally, in combination with its plastic body, I do not like the aesthetics. It makes me feel like I am holding something cheap (The cap is metallic). However, it seems durable.
Furthermore, I may not have a point of comparison, as I mentioned, but I find the tip to be very hard. I felt the spontaneous changes in thickness that I expected while writing, depending on the pressure applied by the hand, to be difficult. In order for the lines I write to actually thicken, I have to exert so much pressure that it would be truly exhausting and unnatural to write like that, and the tip would scratch the paper, leaving marks and indentations even on thick, sturdy paper.

I don't know, maybe it's because I lack experience or perhaps I had very high expectations.